Device for abating smoke



19, 1925. v P. J. SHOMER DEVICE FOR-ABATING- SMOKE 2 Shuts-Sheet i 1 2 5 lNVENTl P. J-SHDMER Filed May 9, 19 23 BYW, W

HISATTORNEYS' May 19, i925. 1,538,597

' P. J. SHOMER DEVICE FOR ABATING SMOKE '56 Filed May 9, 1923 2 Shuts-Sheet 2 EJ. SHOMER INVENTOR.

BYW, mm

HIYSATTORNEYS Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

PETER T. SI-IOMER, OF CLEVELAND, OHIO.

DEVTOE FOR ABATING SMOKE.

Application filed May 9, 1923. Serial No. 637,683.

To all whom it may concern. V

Be it known that I, PETER J. SI-IoMnn,a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, State of Ohio, have invented certain new and useful In'iprovements in a Device for Abatin Smoke, of which the following is a specification.

This invention relates to a device for abating smoke in furnaces and which also assists in promoting complete combustion of the fuel therein.

An object of my invention is to provide a device which is associated with a furnace to hold the combustible materials thereunder in close proximity to the fire, whereby they will be completely burned, thus aha-ting the smoke which is caused when such materials are permitted to pass from the chimney.

Another object of my invention resides in a device for providing and maintaining an air blanket, which extends downwardly across the firebox from opposite sides of the furnace thereby holding the combustible material thereunder, in close proximity to the fire, until completely burned.

the process I employ for abating smoke, which consists of directingan oxygen containing gas into the firebox in such a manner as to retain the combustible material completely thereunder.

Another object of my invention resides in a device, associated with a furnace, whereby air is fed from disaligned outlets at opposite sides of the firebox to provide an air blanket across the firebox retaining the combustible fuel materials thereunder in close proximity to the fire until completely burned.

These and other objects will appear in the following specification and claim.

In the drawings, Fig. 1 is a longitudinal section through the furnace taken on line 1-1 of Fig. 3 showing my invention and its relation at one side of the furnace;

Fig. 2 is a transverse section taken 011 line 22 of Fig. 3 showing my device at opposite sides of the furnace;

Fig. 3 is a section taken on line 3-3 of Fig. 1 showing a top plane view of my device positioned within the furnace;

Fig. 4 is a view taken on line 4l4 of Fig. 1. illustrating the air conduit and an on line of Fig. 1;

outlet in section and showing thesteam pipe and nozzle therein in side elevation;

F 1g. 5 is a section view of a portion of the steam .pipe and an outlet nozzle taken the chain type Fig. 8 is a fragmentary View of a furnace showing the modified form of my device in side elevation in relation therewith;

Fig. 9 is a section taken on line 9-9 of Fig. 7 showing an air booster;and

Fig. 10 is a section of the same taken on line 10-1O of Fig. 9.

Referring now to the drawings by characters of reference Figs. 1 to 6 inclusive illustrate my invention used in connection with a horizontal return tubular boiler type of furnace wherein 21 represents the side walls, and 22 the end walls thereof. The firebox is located above the grate 23, and

' the space below the grate is referred to as Another object of my invention resides in' the ash pit. This furnace is of a conventional design and is merely representative, as my device can be adapted for use with various other types of furnaces.

Conduits 25 extend longitudinally within recesses provided in the side walls of the furnace. The inner ends of the conduits, or headers, are threaded and receive apertured caps 26, these ends of the conduits ex tending into pockets 27 in one of the end walls of the furnace. The opposite ends of the conduits extend through apertures 28 in the opposite end walls, and suitable refractory material 29 encloses the spaces therebetween. Apertured caps 30 are threaded upon the ends of the conduits which protrude through the end wall, to secure them in position with the furnace walls, and to act as closures for the same.

A plurality of spaced outlets 81 extend from the conduits toward the firebox, and their open ends li preferably flush with the inner portion of the sidewalls. These outlets in one conduit are located intermediate the outlets in the conduit at the opposite side wall of the furnace, and other than this difference, my device at one side of the furnace is the same as that at the other side of the furnace. The outlets are designed to direct an oxygen containii ig gas downwardly toward the opposite side of the firebox. w.

A plurality of spaced air'inlets 32 extend downwa clly from the conduits, Within the recesses in the side walls, and curve inwardly under the grate 23 into open communication with the ash pit. These 'iiilets'are preferably arranged, so that an inlet spositioned adjacent each outlet extending from the conduits. V

The conduits, the outlets, and the lnlets are designed to feed the warm air from the ash pit into the firebox above the grate, and ar preferably made of tubing which is treated to withstand heat. A suitable refractory material A is used to fill in the recesses and the pockets within wh ch the tubes are positioned, thereby protecting the tubes from the intense heat and securing them in position with th furnace Steam tubes extend longitudinally one within each conduit and are provided with outlet nozzles which are located to align with the outlets in the conduits. The steam tubes may be made up of sections of pipes 38, which are connected at, their ends by intermediate unions'3 l into which thethreaded nozzles 35 are secured. The ends 36 of the inner sections of thesteam tubes are closed and cone shaped. The steampipes project into and are'secured within the con,

duits andare arranged to be removed therefrom, when desired, without interfering.

with the operation of the furnace. To assemble the steam pipeswlthin the conduits .the caps 30 are removed and the cone shaped ends SSare inserted within the apertures, in the caps 26. The pipes are thenrotated until the outlet nozzles extend in the outlets of the conduit, whereupon the nuts 37 are placed in proper relation upon then threaded sections of the pipes .38 to act as stops for the caps 30.. The caps 30 are then screwed upon the steam pipes until they engage the furnace wall, after the cone. shaped ends of the pipes have bceniirmly,

seated against the apertures in the caps26.

Nuts 39 are then screwed upon the steam pipes until they engage the caps 80. A suitable union 40 is secured to the protruding end of each steam pipe, and supply pipes 41 engage and communicate therewith. Valves 42, which can be operated automatically, or manually, regulatethe pressure and volume of steam which passes into the pipes 33.. p

My device is adapted for use especially when there is a green fire, when draught in the furnace is being forced, or at such other times during which the condition of the tire is such that light volatile fuel or gases become separatedfrom the bed of fire and are liable to be carried up with the air openings and the outlets.

steam under sufficient pressure such that the air will be forced into the firebox with sufiicient force to provide an air blanket. lVith the outlets arranged as described, the fire is entirely covered by the air blanket,wh ich blanket extends downwardly from opposite sides of thelirebox to keep the combustible fuel in close proximity to the fire. 'Inthis manner such fuel, which ordinarily passes throughthechimneywith the draught, is

retaineddn close proximity over the fire until completely burned, thereby abating the smoke and utilizing all of the combustible fuel. Fresh' 'airKvhich is heated con- :tains a'high percentage ofoxygen, and I.

find that it assists the combustion of the fuel which'lies between the fuel bed and the air blanket, and I therefore lead air into the conduits from the ash pit.

In Figs. 7 to lO inclusive, I have illustrated a modified form of my device used 1in coiij'un'ction'with a furnace of a different "type. The general spring ofthe invention is applied here, as previously described,

with the, device located substantially out-.

side of. the, furnace, eliminating the provision of housingrecesses in the side walls and it is secured withthe furnace, so that it maybe entirely removed therefrom without interfering with the'operation thereof. The device as shown in this instance is applied to only one of the side walls of the furnace,

and itis' to be understoodthat a similar arrangement is providedat the other side the furnace. p

In this instance 50 illustrates a longitudinally extending air conduit, or header, which is positioned externally of the si de wall of the furnace, and which is provided with a plurality of spaced outlets 51. p The outlets extend into openings through the side wall of the furnace and are in open communication with the firebox, and refractory material is provided within the The outlets are also arrangedto direct air in a downward direction into the firebox, for the purpose heretofore ,described. single air inlet 52 extends centrally from the conduit and opens into the ash pit below the grate 23,

but if desired a plurality of such inlets, 1

to direct the steam back into the conduit inlet, thereby drawing air from the ash pit into the air inlet With the steam. This arrangement is designed as a booster to increase the volume and velocity of the air drawn through the conduit. Such a booster is necessary only under certain conditions, and ordinarily the device operates efficient ly Without such assistance.

A steam pipe 55 lies Within the conduit and is provided With outlet nozzles, in a similar manner and for the same purpose as previously described in my preferred embodiment. Suitable valves 56 and 57 are provided in the steam pipes 55 and 53 respectively, to regulate the flow of the steam into the outlets as desired. A butterfly or similar valve 58 is provided Within the air inlet pipe to regulate the volume of air desired, or to close the same if desired, and this valve can be operated by hand or by mechanical means.

Various changes can be made in the details of the described mechanism Without departing from the spirit of my invention and the scope of the appended claim.

Having described my invention, What I claim is The combination With a furnace, of a device for abating smoke and promoting com bustion of the fuel comprising air conduit pipes, outlet ports leading from said conduits into opposite sides of the furnace firebox, inlet ports leading from the space heneath the furnacegrate into said conduits, steam pipes having outlet ports coaxial with the outlet ports of said conduits for ejecting air therethrough from beneath the furnace grate, steam pipes extending partially through the inlet ports and projecting from the ends thereof Within the space beneath the furnace grates, box shaped nozzles secured to the ends of the steam pipes in said inlet ports, said nozzles having apertures therein for directing air into said inlet ports from said furnace, and means for controlling the volume of mixture of air and steam passing into said conduits.

In Witness whereof, I have hereunto signed my name this 5th day of May, 1923.

PETER J. SHOMER. 

